Uurnlimited Challenge [Hard]: Dog & Chain

Set the dog control for "jump" if you haven't already. Start a new file, then once you get out of the tutorial, leash a dog as soon as you can and set it down. You are not allowed to pick up the dog or put it in your inventory, and you are not allowed to control the dog. It is only there to weigh you down. If the dog dies, you must Reset Puzzles and leash another dog before you do anything else.

Umm, and what are we supposed to accomplish?

...Really, just try to complete the game as normal. Everything's harder when you're constantly being weighed down.

So the first ending it is, then? Or all of them? Don't even know anything about the third yet.